 /*******************************************************************************
  * Copyright (c) 2006, 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.ui.internal.quickaccess;

 import java.util.HashMap ;
 import java.util.HashSet ;
 import java.util.Map ;
 import java.util.Set ;

 import org.eclipse.jface.action.ActionContributionItem;
 import org.eclipse.jface.action.IContributionItem;
 import org.eclipse.jface.action.MenuManager;
 import org.eclipse.jface.action.SubContributionItem;
 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.internal.IWorkbenchGraphicConstants;
 import org.eclipse.ui.internal.WorkbenchImages;
 import org.eclipse.ui.internal.WorkbenchWindow;

 /**
  * @since 3.3
  *
  */
 public class ActionProvider extends QuickAccessProvider {

     private Map idToElement;

     public String getId() {
         return "org.eclipse.ui.actions"; //$NON-NLS-1$
 }

     public QuickAccessElement getElementForId(String id) {
         getElements();
         return (ActionElement) idToElement.get(id);
     }

     public QuickAccessElement[] getElements() {
         if (idToElement == null) {
             idToElement = new HashMap ();
             WorkbenchWindow window = (WorkbenchWindow) PlatformUI
                     .getWorkbench().getActiveWorkbenchWindow();
             if (window != null) {
                 MenuManager menu = window.getMenuManager();
                 Set result = new HashSet ();
                 collectContributions(menu, result);
                 ActionContributionItem[] actions = (ActionContributionItem[]) result
                         .toArray(new ActionContributionItem[result.size()]);
                 for (int i = 0; i < actions.length; i++) {
                     ActionElement actionElement = new ActionElement(actions[i],
                             this);
                     idToElement.put(actionElement.getId(), actionElement);
                 }
             }
         }
         return (ActionElement[]) idToElement.values().toArray(
                 new ActionElement[idToElement.values().size()]);
     }

     private void collectContributions(MenuManager menu, Set result) {
         IContributionItem[] items = menu.getItems();
         for (int i = 0; i < items.length; i++) {
             IContributionItem item = items[i];
             if (item instanceof SubContributionItem) {
                 item = ((SubContributionItem) item).getInnerItem();
             }
             if (item instanceof MenuManager) {
                 collectContributions((MenuManager) item, result);
             } else if (item instanceof ActionContributionItem
                     && item.isEnabled()) {
                 result.add(item);
             }
         }
     }

     public ImageDescriptor getImageDescriptor() {
         return WorkbenchImages
                 .getImageDescriptor(IWorkbenchGraphicConstants.IMG_OBJ_NODE);
     }

     public String getName() {
         return QuickAccessMessages.QuickAccess_Menus;
     }
 }

